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 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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package com.sun.mail.handlers;

import java.io.*;
import java.nio.ByteBuffer;

import javax.activation.*;
import javax.mail.internet.*;

import com.sun.mail.util.CharsetDetector;

import myjava.awt.datatransfer.DataFlavor;

/**
 * DataContentHandler for text/plain.
 * 
 */
public class text_plain implements DataContentHandler {
	private static ActivationDataFlavor myDF = new ActivationDataFlavor(java.lang.String.class, "text/plain", "Text String");

	/**
	 * An OuputStream wrapper that doesn't close the underlying stream.
	 */
	private static class NoCloseOutputStream extends FilterOutputStream {
		public NoCloseOutputStream(OutputStream os) {
			super(os);
		}

		public void close() {
			// do nothing
		}
	}

	protected ActivationDataFlavor getDF() {
		return myDF;
	}

	/**
	 * Return the DataFlavors for this <code>DataContentHandler</code>.
	 * 
	 * @return The DataFlavors
	 */
	public DataFlavor[] getTransferDataFlavors() {
		return new DataFlavor[] { getDF() };
	}

	/**
	 * Return the Transfer Data of type DataFlavor from InputStream.
	 * 
	 * @param df
	 *            The DataFlavor
	 * @param ds
	 *            The DataSource corresponding to the data
	 * @return String object
	 */
	public Object getTransferData(DataFlavor df, DataSource ds) throws IOException {
		// use myDF.equals to be sure to get ActivationDataFlavor.equals,
		// which properly ignores Content-Type parameters in comparison
		if (getDF().equals(df))
			return getContent(ds);
		else
			return null;
	}

	public Object getContent(DataSource ds) throws IOException {
		InputStream is = ds.getInputStream();
		
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		byte buf[] = new byte[1024];
		int count;
		while((count = is.read(buf)) != -1) {
			baos.write(buf, 0, count);
		}
		buf = baos.toByteArray();
		
		String enc = getCharset(ds.getContentType());
		if (enc == null || "ISO2022KR".equalsIgnoreCase(enc) || "CP949".equalsIgnoreCase(enc) || "MS949".equalsIgnoreCase(enc)) {
			enc = MimeUtility.javaCharset(CharsetDetector.detect(buf));
		}
		return new String(buf, enc);
	}

	/**
	 * Write the object to the output stream, using the specified MIME type.
	 */
	public void writeTo(Object obj, String type, OutputStream os) throws IOException {
		if (!(obj instanceof String))
			throw new IOException("\"" + getDF().getMimeType() + "\" DataContentHandler requires String object, " + "was given object of type " + obj.getClass().toString());

		String enc = null;
		OutputStreamWriter osw = null;

		try {
			enc = getCharset(type);
			osw = new OutputStreamWriter(new NoCloseOutputStream(os), enc);
		} catch (IllegalArgumentException iex) {
			/*
			 * An unknown charset of the form ISO-XXX-XXX will cause
			 * the JDK to throw an IllegalArgumentException. The
			 * JDK will attempt to create a classname using this string,
			 * but valid classnames must not contain the character '-',
			 * and this results in an IllegalArgumentException, rather than
			 * the expected UnsupportedEncodingException. Yikes.
			 */
			throw new UnsupportedEncodingException(enc);
		}

		String s = (String) obj;
		osw.write(s, 0, s.length());
		/*
		 * Have to call osw.close() instead of osw.flush() because
		 * some charset converts, such as the iso-2022-jp converter,
		 * don't output the "shift out" sequence unless they're closed.
		 * The NoCloseOutputStream wrapper prevents the underlying
		 * stream from being closed.
		 */
		osw.close();
	}

	private String getCharset(String type) {
		try {
			ContentType ct = new ContentType(type);
			return MimeUtility.javaCharset(ct.getParameter("charset"));
		} catch (Exception ex) {
			return null;
		}
	}
}
